Use correct version string format in setup instructions

If somebody uses `1.15.0` instead of `v1.15.0` the installation will fail, this adjusts instructions to be slightly clearer.
Azure · Dec 18, 2019 · d0d6381 · d0d6381
1 parent 87a2cd5
commit d0d6381
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -1,7 +1,7 @@
 # Setup Helm
 #### Install a specific version of helm binary on the runner.
 
-Acceptable values are latest or any semantic version string like 1.15.0. Use this action in workflow to define which version of helm will be used.
+Acceptable values are latest or any semantic version string like `v1.15.0`. Use this action in workflow to define which version of helm will be used.
 
 ```yaml
 - uses: azure/setup-helm@v1